If the parking fee is less than $20, it will appear as a charge on your E-ZPass statement, and will be deducted from your E-ZPass account balance.
If the fee is $20 or more, it will be charged immediately to the credit card you use to replenish your E-ZPass account. Two transactions will be reflected on your E-ZPass statement; the charge for parking and the corresponding credit card payment. (For example: If you owe $25 for parking, it will appear on your statement as a $25 credit to your account from the immediate charge to your credit card and a $25 debit for the parking transaction payment.)